Hiphop Girl Groups

Not all of these groups are 'pure' hiphop, but usually mix genres. I also only mentioned groups that are officially listed as hiphop groups, because I don't know what defines hiphop. I'd rather trust music sites who get their information from the company then have to make a guess on which group is and which isn't. I did think about groups such as 2NE1, 4Minute and The Ark, but they are not listed as hiphop groups, so I won't add them.
Not all girl groups with a strong concept are hiphop groups.

Like I said, I don't know what defines hiphop, so I rather use a music site who gets the information from the company then having to make the guess myself. Besides, I'm way to unfamliar with their discography to make a judgement on wether or not they are hiphop.